| 焙烧对HL沸石结构的影响 |
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| 引用本文： | 刘兴玉,丁淑芳,潘惠芳,王京. 焙烧对HL沸石结构的影响[J]. 波谱学杂志, 2004, 21(2): 237-241 |
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| 作者姓名： | 刘兴玉 丁淑芳 潘惠芳 王京 |
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| 作者单位： | 石油大学,北京,CNPC催化重点实验室,北京,102249;石油化工科学研究院,北京,100083 |
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| 基金项目： | 中国石油化工集团资助项目 |
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| 摘 要： | 运用MAS NMR研究了焙烧对HL沸石结构的影响. 结果表明，高温焙烧将引起HL沸石骨架的脱铝，当焙烧温度高于650 ℃后，沸石骨架脱铝明显；27Al MAS NMR谱表明，从沸石上脱下来的铝，部分形成了NMR不可测的无定形态，且随焙烧温度的升高，NMR不可测铝增多.
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| 关 键 词： | 29Si MAS NMR 27 Al MAS NMR 结构 焙烧 脱铝 HL沸石 |
| 文章编号： | 1000-4556(2004)02-0237-05 |
| 收稿时间： | 2003-11-24 |
| 修稿时间： | 2003-11-24 |
STRUCTURE CHANGES OF HL ZEOLITE AFTER CALCINATION |
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| LIU Xing-yu,DING Shu-fang,PAN Hui-fang. STRUCTURE CHANGES OF HL ZEOLITE AFTER CALCINATION[J]. Chinese Journal of Magnetic Resonance, 2004, 21(2): 237-241 |
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| Authors: | LIU Xing-yu DING Shu-fang PAN Hui-fang |
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| Affiliation: | CNPC Key Laboratory of Catalysis, University of Petroleum, Beijing 102249, China； Research Institute of Petroleum Processing，Beijing 100083，China |
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| Abstract: | The effect of calcination temperature (from 773 K to 1 073 K) on the structure of HL zeolite was studied using ~(29)Si and ~(27)Al MAS NMR. The NMR spectra of zeolite were greatly influenced by calcination. The backbone of HL zeolite suffered from severe dealumination by calcination at temperatures higher than 923 K. The results from ~(27)Al MAS NMR measurements implied that Al in the backbone of zeolite was only partially NMR-visible. The NMR-invisible Al increased with the increase of calcination temperature. |
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| Keywords: | 29Si MAS NMR 27 Al MAS NMR |
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